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A cylindrical container, closed at both ends, has a radius of 7 cm and a...

Mathematics
WAEC 2025

A cylindrical container, closed at both ends, has a radius of 7 cm and a height of 5 cm. Use this information to answer the questions below. Find the total surface area of the container.

  • A. 35 cm\(^2\)
  • B. 528 cm\(^2\)
  • C. 154 cm\(^2\)
  • D. 220 cm\(^2\)
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Correct Answer: Option B
Explanation

Total surface area = 2πr\(^2\) + 2πrh = 2πr(r + h) ⇒ 2 × \(\frac{22}{7}\) × 7 × (7 + 5) ⇒ 44 × 12 = 528 cm\(^2\)

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